Mr. W. Sells’s Notes, &c. 
207 
Fig. 5. Tip of the superior antenna. 
6. Tip of the inferior. 
7. The exterior of the first pair of legs or arms. 
8. The inner surface of the first legs. 
9. The manducatory apparatus detached; a, the mandibles?; b, the max- 
illae ? ; c, d, palpi ?;<?*, apex of the superior seen from below ; e, part 
of the upper lip in situ carrying the minute palpiform process. 
10. The mandibles ? and maxilla;? from above; n, the penultimate joint. 
1 1 . The same from beneath ; m, the lamella attached to the inferior surface 
of the penultimate joint n, fig. 10. 
T2. The same seen from inside. 
13. The second pair of legs. 
14. The third pair of legs. 
15. Last joint of the swimming feet. 
16. The apex of the caudal ling with the style. 
17. The joint of the style which is concealed with the lateral part of the 
caudal ring. 
Obs. — The organs on one side of the animal alone are deli- 
neated, in order to prevent confusion. 
XLII. Notes respecting the Nest of Cteniza nidulans. By 
W. Sells, Esq. 
[Read 2d January, 1837.] 
Having received from the island of Jamaica at different times, in 
the course of the last twelve years, a number of the nests of 
Cteniza nidulans, with many specimens of the ingenious artisans 
which construct and inhabit them, I have been afforded favourable 
opportunities for making observations upon this curious and in- 
teresting structure, and which we may rank among the chef- 
d’ceuvres of insect architecture. Those remarks are now brought 
together, and, with some sketches of the nest and insect, are sub- 
mitted to the notice of the Society. 
Large districts of the central parts of Jamaica, in which island 
I resided above twenty years, consist of a reddish argillaceous 
earth upon a limestone honey-comb rock, and the country is so 
hilly as to be termed mountainous ; the red dirt, as it is commonly 
called, occupies the vallies, and more scantily covers the hills, 
where it is mixed with vegetable mould and nodules of the rock ; 
the latter is in vast masses, and sometimes appears in large iso- 
lated portions, with perpendicular surfaces of from ten to thirty 
feet square ; its cellular formation denotes its igneous origin, and 
